CN110042390B - Flexible film-pasting laser cladding strengthening method for die-casting die - Google Patents
Flexible film-pasting laser cladding strengthening method for die-casting die Download PDFInfo
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- 238000004512 die casting Methods 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000004372 laser cladding Methods 0.000 title claims abstract description 48
- 238000005728 strengthening Methods 0.000 title claims abstract description 25
- 239000000843 powder Substances 0.000 claims abstract description 116
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 60
- 239000000956 alloy Substances 0.000 claims abstract description 60
- 238000005253 cladding Methods 0.000 claims abstract description 31
- 238000005498 polishing Methods 0.000 claims abstract description 13
- 238000005299 abrasion Methods 0.000 claims abstract description 11
- 239000012535 impurity Substances 0.000 claims abstract description 11
- 238000009659 non-destructive testing Methods 0.000 claims abstract description 5
- 239000004816 latex Substances 0.000 claims description 27
- 229920000126 latex Polymers 0.000 claims description 27
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 13
- 229910052804 chromium Inorganic materials 0.000 claims description 10
- 229910052750 molybdenum Inorganic materials 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 10
- 238000005096 rolling process Methods 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- 239000003755 preservative agent Substances 0.000 description 16
- 230000002335 preservative effect Effects 0.000 description 16
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 8
- 230000007547 defect Effects 0.000 description 8
- 239000000835 fiber Substances 0.000 description 8
- 238000007689 inspection Methods 0.000 description 8
- 238000003754 machining Methods 0.000 description 8
- 238000001179 sorption measurement Methods 0.000 description 8
- 230000006378 damage Effects 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000004227 thermal cracking Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/2209—Selection of die materials
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- B22F1/0003—
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a flexible film laser cladding strengthening method of a die-casting die, which comprises the steps of comprehensively detecting the die-casting die and determining the abrasion loss of the die; removing the fatigue wear layer on the surface and removing impurities on the processed surface; preparing alloy powder, presetting the alloy powder on the surface of a die-casting die to be clad, and scanning a preset flexible film through a laser to prepare a wear-resistant laser cladding layer; and carrying out nondestructive testing on the surface of the cladding layer and carrying out grinding and polishing treatment on the cladding layer. The method provided by the invention not only improves the utilization rate of the powder in the cladding process, ensures uniform powder delivery and reduces the strengthening cost, but also prolongs the service life of the repaired die-casting die by more than one time compared with the conventional repairing method.
Description
Technical Field
The invention relates to the technical field of metal surface treatment, in particular to a flexible film laser cladding strengthening method of a die-casting die.
Background
Die casting is a casting method for efficiently producing parts with high dimensional accuracy and good surface quality by injecting a molten metal such as an aluminum alloy into a mold at high speed and high pressure, and is widely used for producing parts such as automobiles, OA equipment, home appliances, and buildings. Among them, the die casting mold is subjected to thermal shock of heating and cooling and thermal fatigue, and various damages occur, which affect the dimensional accuracy and appearance quality of the die casting product.
The main cause of die casting die damage is thermal cracking caused by thermal stress and thermal fatigue, wherein more than 70% of damage is thermal cracking. In order to prevent the die-casting die from generating hot cracks, the performance of the die can be improved by selecting die materials with good high-temperature strength, toughness and hardness or by a heat treatment method; or its performance is improved by surface modification techniques. The most advanced surface modification technology of the die-casting die at present adopts a laser cladding technology, and the laser cladding has the characteristics of high energy density, compact cladding quality, high bonding strength, low dilution rate of an alloying layer tissue, small heat affected zone and the like.
In the process of strengthening the die-casting die by adopting a laser cladding technology, due to the existence of various special curved surfaces, sharp points, vertical surfaces and the like of the die-casting die, even if a coaxial powder feeding mode is adopted in the cladding process, the uniform powder conveying is difficult to ensure; meanwhile, in the curved surface cladding process, the waste of the coaxial powder feeding metal powder is serious, and the effective utilization rate of the powder is only about 40%. How to improve the utilization ratio of powder in the cladding process, guarantee that the powder is carried evenly, reduce the intensive cost becomes one of the key problems that await solution urgently.
Disclosure of Invention
Aiming at the technical problems, the invention aims to provide a flexible film laser cladding strengthening method for a die-casting die, which not only improves the utilization rate of powder in the cladding process, ensures uniform powder delivery and reduces the strengthening cost, but also prolongs the service life of the repaired die-casting die by more than one time compared with the conventional repairing method.
In order to achieve the purpose, the method is realized by the following technical scheme:
a flexible film laser cladding strengthening method of a die-casting die comprises the following steps,
step one, carrying out comprehensive detection on a die-casting die and determining the abrasion loss of the die;
removing a surface fatigue wear layer and removing impurities on a machined surface;
preparing alloy powder, presetting the alloy powder on the surface of a die-casting die to be clad, and scanning a preset flexible film through a laser to prepare a wear-resistant laser cladding layer;
and fourthly, carrying out nondestructive testing on the surface of the cladding layer and carrying out grinding and polishing treatment on the cladding layer.
The flexible film laser cladding strengthening method for the die-casting die comprises the following steps of: 0.30-0.35%, Cr: 4.78-5.02%, Mo: 1.42-1.50%, Si: 0.95-1.05%, Mn: 0.30-0.35% and the balance Fe.
In the second step, the cutting amount of the corrosion fatigue layer is 0.2-0.3 mm.
Firstly, uniformly coating 0.05-0.1mm of white emulsion glue on one surface of the flexible film, after the white emulsion glue is slightly dried, uniformly spraying the prepared alloy powder on the white emulsion glue through an electrostatic powder sprayer, rolling by using a manual roller press, and controlling the thickness of the powder to be 0.6-0.8mm to prepare the flexible film with one surface coated with powder; and pasting the other side of the flexible film with the metal powder on the surface of the die to be clad to finish the preset powder.
In the third step, the process parameters of laser scanning are as follows: the laser light spot is in a circle with the diameter of 3mm, the scanning power is 3000-.
The flexible film laser cladding strengthening method for the die-casting die comprises the step of carrying out laser cladding on the flexible film, wherein the lapping rate is 30-50%.
The flexible film laser cladding strengthening method of the die-casting die is characterized in that the thickness of the laser cladding layer is 0.5 mm.
The flexible film laser cladding strengthening method of the die-casting die comprises the step of forming an alloy powder with the granularity of 350-450 meshes.
The flexible film laser cladding strengthening method of the die-casting die is characterized in that the grinding amount is 0.3-0.2mm when the surface of the cladding layer is subjected to grinding and polishing treatment.
The flexible film laser cladding strengthening method for the die-casting die comprises the step four, wherein nondestructive testing is surface dye check testing.
By adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
1. the method improves the performance of the die-casting die, and the service life of the repaired die-casting die is prolonged by more than one time compared with the service life of the die-casting die prepared by the conventional repairing method through laser cladding reinforcement;
2. compared with a coaxial powder feeding method, the method provided by the invention has the advantages that the powder utilization rate is improved, the powder utilization rate reaches about 98%, and the requirements of material saving, energy saving and environmental protection are met.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments.
Example 1
Firstly, comprehensively detecting a die-casting die by using a three-coordinate measuring instrument to determine the abrasion loss of the die; removing a surface fatigue wear layer by machining, wherein the single-side removal amount is 0.2 mm; cleaning the processed surface with anhydrous alcohol to remove impurities such as oil stain; preparing alloy powder, wherein the alloy powder comprises the following components in percentage by mass: c: 0.30%, Cr: 4.78%, Mo: 1.42%, Si: 0.95%, Mn: 0.30 percent, the balance being Fe, and the granularity of the alloy powder being 350-450 meshes; alloy powder is preset by utilizing a preservative film, firstly, 0.05mm of white latex is uniformly coated on one surface of the preservative film, when the white latex is slightly dried, the prepared alloy powder is uniformly sprayed on the white latex through an electrostatic powder spraying machine, and a manual roller press is utilized for rolling, so that the thickness of the powder is controlled to be 0.6mm, and the flexible film with one surface coated with the powder is prepared; attaching the other side of the flexible film with the metal powder to the surface of a die to be clad, uniformly attaching the flexible film to the surface of a die-casting die in an electrostatic adsorption mode, and presetting the alloy powder on the surface of the die-casting die to be clad through the flexible film; scanning a preset flexible film by adopting a fiber laser operated by a manipulator, wherein the laser cladding process parameters are as follows: the laser light spot is in a round shape with the diameter of 3mm, the scanning power is 3000W, the scanning speed is 800mm/min, the lap joint rate is 50 percent, and the thickness of the prepared wear-resistant laser cladding layer is 0.5 mm; performing surface dye inspection on the surface of the cladding layer, and detecting whether defects such as cracks exist; and (4) grinding and polishing the cladding layer, wherein the grinding amount is 0.3 mm.
Example 2
Firstly, comprehensively detecting a die-casting die by using a three-coordinate measuring instrument to determine the abrasion loss of the die; removing a surface fatigue wear layer by machining, wherein the single-side removal amount is 0.3 mm; cleaning the processed surface with anhydrous alcohol to remove impurities such as oil stain; preparing alloy powder, wherein the alloy powder comprises the following components in percentage by mass: c: 0.35%, Cr: 5.02%, Mo: 1.50%, Si: 1.05%, Mn: 0.35 percent, the balance being Fe, and the granularity of the alloy powder being 350-450 meshes; alloy powder is preset by utilizing a preservative film, firstly, 0.1mm of white latex is uniformly coated on one surface of the preservative film, when the white latex is slightly dried, the prepared alloy powder is uniformly sprayed on the white latex through an electrostatic powder spraying machine, and a manual roller press is utilized for rolling, so that the thickness of the powder is controlled to be 0.8mm, and the flexible film with one surface coated with the powder is prepared; attaching the other side of the flexible film with the metal powder to the surface of a die to be clad, uniformly attaching the flexible film to the surface of a die-casting die in an electrostatic adsorption mode, and presetting the alloy powder on the surface of the die-casting die to be clad through the flexible film; scanning a preset flexible film by adopting a fiber laser operated by a manipulator, wherein the laser cladding process parameters are as follows: the laser light spot is in a round shape with the diameter of 3mm, the scanning power is 3300W, the scanning speed is 1000mm/min, the lap joint rate is 50%, and the thickness of the prepared wear-resistant laser cladding layer is 0.5 mm; performing surface dye inspection on the surface of the cladding layer, and detecting whether defects such as cracks exist; and (4) grinding and polishing the cladding layer, wherein the grinding amount is 0.2 mm.
Example 3
Firstly, comprehensively detecting a die-casting die by using a three-coordinate measuring instrument to determine the abrasion loss of the die; removing a surface fatigue wear layer by machining, wherein the single-side removal amount is 0.2 mm; cleaning the processed surface with anhydrous alcohol to remove impurities such as oil stain; preparing alloy powder, wherein the alloy powder comprises the following components in percentage by mass: c: 0.30%, Cr: 5.02%, Mo: 1.50%, Si: 1.05%, Mn: 0.30 percent, the balance being Fe, and the granularity of the alloy powder being 350-450 meshes; alloy powder is preset by utilizing a preservative film, firstly, 0.05mm of white latex is uniformly coated on one surface of the preservative film, when the white latex is slightly dried, the prepared alloy powder is uniformly sprayed on the white latex through an electrostatic powder spraying machine, and a manual roller press is utilized for rolling, so that the thickness of the powder is controlled to be 0.6mm, and the flexible film with one surface coated with the powder is prepared; attaching the other side of the flexible film with the metal powder to the surface of a die to be clad, uniformly attaching the flexible film to the surface of a die-casting die in an electrostatic adsorption mode, and presetting the alloy powder on the surface of the die-casting die to be clad through the flexible film; scanning a preset flexible film by adopting a fiber laser operated by a manipulator, wherein the laser cladding process parameters are as follows: the laser spot is in a round shape with the diameter of 3mm, the scanning power is 3100W, the scanning speed is 800mm/min, the lap joint rate is 35 percent, and the thickness of the prepared wear-resistant laser cladding layer is 0.5 mm; performing surface dye inspection on the surface of the cladding layer, and detecting whether defects such as cracks exist; and (4) grinding and polishing the cladding layer, wherein the grinding amount is 0.3 mm.
Example 4
Firstly, comprehensively detecting a die-casting die by using a three-coordinate measuring instrument to determine the abrasion loss of the die; removing a surface fatigue wear layer by machining, wherein the single-side removal amount is 0.2 mm; cleaning the processed surface with anhydrous alcohol to remove impurities such as oil stain; preparing alloy powder, wherein the alloy powder comprises the following components in percentage by mass: c: 0.35%, Cr: 5.00%, Mo: 1.45%, Si: 1.00%, Mn: 0.35 percent, the balance being Fe, and the granularity of the alloy powder being 350-450 meshes; alloy powder is preset by utilizing a preservative film, firstly, 0.06mm of white latex is uniformly coated on one surface of the preservative film, when the white latex is slightly dried, the prepared alloy powder is uniformly sprayed on the white latex through an electrostatic powder spraying machine, and the powder is rolled by utilizing a manual roller press, the thickness of the powder is controlled to be 0.6mm, so that the flexible film with one surface coated with the powder is prepared; attaching the other side of the flexible film with the metal powder to the surface of a die to be clad, uniformly attaching the flexible film to the surface of a die-casting die in an electrostatic adsorption mode, and presetting the alloy powder on the surface of the die-casting die to be clad through the flexible film; scanning a preset flexible film by adopting a fiber laser operated by a manipulator, wherein the laser cladding process parameters are as follows: the laser spot is in a circular shape with the diameter of 3mm, the scanning power is 3200W, the scanning speed is 950mm/min, the lap joint rate is 50%, and the thickness of the prepared wear-resistant laser cladding layer is 0.5 mm; performing surface dye inspection on the surface of the cladding layer, and detecting whether defects such as cracks exist; and (4) grinding and polishing the cladding layer, wherein the grinding amount is 0.3 mm.
Example 5
Firstly, comprehensively detecting a die-casting die by using a three-coordinate measuring instrument to determine the abrasion loss of the die; removing a surface fatigue wear layer by machining, wherein the single-side removal amount is 0.2 mm; cleaning the processed surface with anhydrous alcohol to remove impurities such as oil stain; preparing alloy powder, wherein the alloy powder comprises the following components in percentage by mass: c: 0.35%, Cr: 5.02%, Mo: 1.45%, Si: 0.96%, Mn: 0.32 percent, the balance being Fe, and the granularity of the alloy powder being 350-450 meshes; alloy powder is preset by utilizing a preservative film, firstly, 0.05mm of white latex is uniformly coated on one surface of the preservative film, when the white latex is slightly dried, the prepared alloy powder is uniformly sprayed on the white latex through an electrostatic powder spraying machine, and a manual roller press is utilized for rolling, so that the thickness of the powder is controlled to be 0.6mm, and the flexible film with one surface coated with the powder is prepared; attaching the other side of the flexible film with the metal powder to the surface of a die to be clad, uniformly attaching the flexible film to the surface of a die-casting die in an electrostatic adsorption mode, and presetting the alloy powder on the surface of the die-casting die to be clad through the flexible film; scanning a preset flexible film by adopting a fiber laser operated by a manipulator, wherein the laser cladding process parameters are as follows: the laser spot is in a round shape with the diameter of 3mm, the scanning power is 3300W, the scanning speed is 1000mm/min, the lap joint rate is 40%, and the thickness of the prepared wear-resistant laser cladding layer is 0.5 mm; performing surface dye inspection on the surface of the cladding layer, and detecting whether defects such as cracks exist; and (4) grinding and polishing the cladding layer, wherein the grinding amount is 0.3 mm.
Example 6
Firstly, comprehensively detecting a die-casting die by using a three-coordinate measuring instrument to determine the abrasion loss of the die; removing a surface fatigue wear layer by machining, wherein the single-side removal amount is 0.3 mm; cleaning the processed surface with anhydrous alcohol to remove impurities such as oil stain; preparing alloy powder, wherein the alloy powder comprises the following components in percentage by mass: c: 0.35%, Cr: 4.78%, Mo: 1.50%, Si: 1.05%, Mn: 0.35 percent, the balance being Fe, and the granularity of the alloy powder being 350-450 meshes; alloy powder is preset by utilizing a preservative film, firstly, 0.08mm of white latex is uniformly coated on one surface of the preservative film, when the white latex is slightly dried, the prepared alloy powder is uniformly sprayed on the white latex through an electrostatic powder spraying machine, and a manual roller press is utilized for rolling, so that the thickness of the powder is controlled to be 0.8mm, and the flexible film with one surface coated with the powder is prepared; attaching the other side of the flexible film with the metal powder to the surface of a die to be clad, uniformly attaching the flexible film to the surface of a die-casting die in an electrostatic adsorption mode, and presetting the alloy powder on the surface of the die-casting die to be clad through the flexible film; scanning a preset flexible film by adopting a fiber laser operated by a manipulator, wherein the laser cladding process parameters are as follows: the laser light spot is in a round shape with the diameter of 3mm, the scanning power is 3300W, the scanning speed is 900mm/min, the lap joint rate is 50%, and the thickness of the prepared wear-resistant laser cladding layer is 0.5 mm; performing surface dye inspection on the surface of the cladding layer, and detecting whether defects such as cracks exist; and (4) grinding and polishing the cladding layer, wherein the grinding amount is 0.2 mm.
Example 7
Firstly, comprehensively detecting a die-casting die by using a three-coordinate measuring instrument to determine the abrasion loss of the die; removing a surface fatigue wear layer by machining, wherein the single-side removal amount is 0.2 mm; cleaning the processed surface with anhydrous alcohol to remove impurities such as oil stain; preparing alloy powder, wherein the alloy powder comprises the following components in percentage by mass: c: 0.30%, Cr: 4.80%, Mo: 1.45%, Si: 1.00%, Mn: 0.33 percent, the balance being Fe, and the granularity of the alloy powder being 350-450 meshes; alloy powder is preset by utilizing a preservative film, firstly, 0.1mm of white latex is uniformly coated on one surface of the preservative film, when the white latex is slightly dried, the prepared alloy powder is uniformly sprayed on the white latex through an electrostatic powder spraying machine, and a manual roller press is utilized for rolling, so that the thickness of the powder is controlled to be 0.8mm, and the flexible film with one surface coated with the powder is prepared; attaching the other side of the flexible film with the metal powder to the surface of a die to be clad, uniformly attaching the flexible film to the surface of a die-casting die in an electrostatic adsorption mode, and presetting the alloy powder on the surface of the die-casting die to be clad through the flexible film; scanning a preset flexible film by adopting a fiber laser operated by a manipulator, wherein the laser cladding process parameters are as follows: the laser spot is in a circular shape with the diameter of 3mm, the scanning power is 3200W, the scanning speed is 900mm/min, the lap joint rate is 45 percent, and the thickness of the prepared wear-resistant laser cladding layer is 0.5 mm; performing surface dye inspection on the surface of the cladding layer, and detecting whether defects such as cracks exist; and (4) grinding and polishing the cladding layer, wherein the grinding amount is 0.3 mm.
Example 8
Firstly, comprehensively detecting a die-casting die by using a three-coordinate measuring instrument to determine the abrasion loss of the die; removing a surface fatigue wear layer by machining, wherein the single-side removal amount is 0.3 mm; cleaning the processed surface with anhydrous alcohol to remove impurities such as oil stain; preparing alloy powder, wherein the alloy powder comprises the following components in percentage by mass: c: 0.33%, Cr: 4.92%, Mo: 1.45%, Si: 1.03%, Mn: 0.32 percent, the balance being Fe, and the granularity of the alloy powder being 350-450 meshes; presetting alloy powder by using a preservative film, firstly uniformly coating 0.07mm of white latex on one surface of the preservative film, uniformly spraying the prepared alloy powder on the white latex through an electrostatic powder sprayer after the white latex is slightly dried, and rolling by using a manual roller press to control the thickness of the powder to be 0.7mm to prepare a flexible film with one surface coated with powder; attaching the other side of the flexible film with the metal powder to the surface of a die to be clad, uniformly attaching the flexible film to the surface of a die-casting die in an electrostatic adsorption mode, and presetting the alloy powder on the surface of the die-casting die to be clad through the flexible film; scanning a preset flexible film by adopting a fiber laser operated by a manipulator, wherein the laser cladding process parameters are as follows: the laser light spot is in a round shape with the diameter of 3mm, the scanning power is 3000W, the scanning speed is 800mm/min, the lap joint rate is 30 percent, and the thickness of the prepared wear-resistant laser cladding layer is 0.5 mm; performing surface dye inspection on the surface of the cladding layer, and detecting whether defects such as cracks exist; and (4) grinding and polishing the cladding layer, wherein the grinding amount is 0.2 mm.
According to the embodiments, the obtained surface cladding alloy layer has good wear resistance and corrosion resistance, the die-casting die is repaired in a strengthening way, and the service life of the repaired die-casting die is obviously prolonged.
Claims (9)
1. A flexible film laser cladding strengthening method of a die-casting die is characterized by comprising the following steps,
step one, carrying out comprehensive detection on a die-casting die and determining the abrasion loss of the die;
removing a surface fatigue wear layer and removing impurities on a machined surface;
step three, preparing alloy powder;
step four, alloy powder is preset on the surface of the die-casting die to be clad, and the method comprises the following steps: firstly, uniformly coating 0.05-0.1mm of white latex on one surface of a flexible film, uniformly spraying prepared alloy powder on the white latex through an electrostatic powder sprayer after the white latex is slightly dried, and rolling by utilizing a manual roller press to control the thickness of the powder to be 0.6-0.8mm to prepare the flexible film with one surface coated with powder; attaching the other side of the flexible film with the metal powder to the surface of a die to be clad to finish powder presetting;
scanning a preset flexible film through a laser to prepare a wear-resistant laser cladding layer;
and sixthly, performing nondestructive testing on the surface of the cladding layer and polishing the cladding layer.
2. The flexible film laser cladding strengthening method of the die-casting die as claimed in claim 1, wherein the alloy powder comprises the following components by mass percent: 0.30-0.35%, Cr: 4.78-5.02%, Mo: 1.42-1.50%, Si: 0.95-1.05%, Mn: 0.30-0.35% and the balance Fe.
3. The method for the flexible film laser cladding strengthening of the die casting die as claimed in claim 1, wherein in the second step, the cutting amount of the corrosion fatigue layer is 0.2-0.3 mm.
4. The flexible film laser cladding strengthening method of the die-casting die as claimed in claim 1, wherein in the fifth step, the process parameters of laser scanning are as follows: the laser light spot is in a circle with the diameter of 3mm, the scanning power is 3000-.
5. The flexible film laser cladding strengthening method of the die casting mold according to claim 1, wherein the lapping rate is 30-50% at the time of laser cladding.
6. The flexible film laser cladding strengthening method of the die casting mold as claimed in claim 1, wherein the thickness of the laser cladding layer is 0.5 mm.
7. The method for the flexible film laser cladding strengthening of the die casting mold as claimed in claim 2, wherein the grain size of the alloy powder is 350-450 mesh.
8. The method for the flexible film laser cladding strengthening of the die casting mold according to claim 7, wherein a grinding amount is 0.3-0.2mm when the cladding layer surface is subjected to a grinding and polishing treatment.
9. The flexible film laser cladding strengthening method for the die-casting die as claimed in claim 1, wherein the nondestructive testing in the sixth step is surface dye check testing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910474714.9A CN110042390B (en) | 2019-06-03 | 2019-06-03 | Flexible film-pasting laser cladding strengthening method for die-casting die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910474714.9A CN110042390B (en) | 2019-06-03 | 2019-06-03 | Flexible film-pasting laser cladding strengthening method for die-casting die |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110042390A CN110042390A (en) | 2019-07-23 |
| CN110042390B true CN110042390B (en) | 2020-10-02 |
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| CN113403542A (en) * | 2021-06-24 | 2021-09-17 | 张云江 | Alloy powder for H13 steel die repair and laser repair method |
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Effective date of registration: 20230817 Address after: 528400 1st and 2nd floors of Huangniuling Building 5, Tanggan Village, San Township, Zhongshan City, Guangdong Province Patentee after: Zhongshan Youyuan Precision Mold Manufacturing Co.,Ltd. Address before: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee before: Dragon totem Technology (Hefei) Co.,Ltd. Effective date of registration: 20230817 Address after: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee after: Dragon totem Technology (Hefei) Co.,Ltd. Address before: 066004 No. 438 west section of Hebei Avenue, seaport District, Hebei, Qinhuangdao Patentee before: Yanshan University |